But when is a reference 'English'? Some could be used for other languages as well, especially etymological dictionaries. —CodeCat 20:06, 23 June 2012 (UTC)

Well, categorization isn't intended to (and won't) stop user using reference templates whenever they are useful. Nor does categorization have to be limited to only one language. Mglovesfun (talk) 21:16, 23 June 2012 (UTC)